Visual Studio 2015 - Visual Studio Gallery Error while connecting to Visual Studio gallery for extensions and updates

Question

When trying to get a visual studio extension from Extensions & Updates, I get the following error:-

An error occurred while making the HTTP request to visualstudiogallery.msdn.microsoft.com/Services/VStudio/Extension.svc

I can see that few others have faced this problem, but I can't see any solution anywhere. Also, a similar error occurs when trying to fetch nuget package.

PS: The message is a bit misleading as with svcutil, I can create a proxy using the same address:- svcutil https://visualstudiogallery.msdn.microsoft.com/Services/VStudio/Extension.svc

Answer 1

This usually happens when you are behind a proxy.

Try to close Visual Studio and update the devenv.exe.config file located in
C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE and search for the system.net node. If it isn't there then add it, otherwise change it to look like this:

<system.net>
  <defaultProxy enabled="true" useDefaultCredentials="true">
    <proxy usesystemdefault="true" bypassonlocal="true" />
  </defaultProxy>
</system.net>

This will cause Visual Studio to use the system defined proxy and use your credentials if the proxy requires you to logon.